Operating System (OS)
A program

is the device where information is stored
is a sequence of instructions
is a device that performs a sequence of operations specified by instructions in memory.
None of these
is typically characterized by interactive processing and time of the CPU

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Operating System (OS)
Object code

must be rewritten before execution
None of these
is the output of compilers, but not assemblers
must be "loaded" before execution
is ready to execute

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Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

None of these
they are memory resident
they are partly in primary memory and partly on disk
they are available on magnetic tapes
they are initially stored on disk

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Operating System (OS)
Feed back queue

dispatch tasks according to execution characteristics
None of these
are used to favor real-time tasks
require manual intervention to implement properly
are very easy to implement

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